Portable tar and asphalt heater for road maintenance



Sept. 2 1924. 1,507,009

- H. H. STRIETMANN PORTABLE TAR AND ASPHALT HEATER FOR ROAD MAINTENANCE Filed March 5. 1924 z 20 m j i 1 5V 0 m Patented Sept. 2 1924.

UNITED 1S TA P TENT oF i-c-E-i 4 HERMAN H. STRIET'MANN, or -omoinna'rn 0 1-110, assisivon ro tii'rnnronn BROTHERS, or cmomnarnjonro, A PARTNERSHIP compose]; orv JOHN s. LITTLE-' FORD, THOMAS s. rrrmnnronn, noonn s. LIr'rLnroRn, AND JOHN s. LITTLE- ronn, JR. I

- :rfon rAnLE nun AsPHAL'r HEATEREOR ROAD MAINTENANCE.

7 Application mac-mien 5, 1924. Serial no. emgiai.

To all whom it may concern: I

Be it known that I, HnmiAN H. S'rmn'r- MANN, a citizen of the United States, and a resident of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Portable Tar and Asphalt Heaters for Road Maintenance, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming part of this specification.

My invention relates to the axle construction for portable tar and asphalt heaters, whereby springs may be interposed between the axle and the frame to provide a construction better adapted for rapid movement from place to place when trailed behind rapidly moving motor vehicles, than the constructions now in use, and it consists of that simple construction and method of assembly to be hereinafter particularly pointed out and claimed, whereby the desired springs may be applied. 7 V

Of course, springs of very many different constructions interposed between thecarry- 'ing axle and frame of all sorts of vehicles, are exceedingly old and my invention is particularly directed to a construction that can be most readily and easily applied in the simplest and most effective manner at very small expense.

In the drawing:

Figure 1 is a perspective view of a portion of one side of the heater, illustrating my construction for applying the springs.

Figure 2 is a central Vertical section on the line 2-2 of Figure 1.

Figure 3 is a cross section on the line 33 of Figure 2.

Figure 4 is a detail cross section taken through the angle bar and retaining bolt.

A portion of the side of the heater is shown at 1', upon which are riveted or otherwise secured, angle bars 2, 2, for mounting the heater on the carrying axle 3.

A metal strap at is provided, one for each side of the car, bent to provide a horizontal portion 5 with sides 6, 6, to conform to the inclination of the angle bars 2, 2. 7

An inner strap is also provided with flaring ends 7, 7, to conform to the inclination of the angle bars 2, and with upper horizontal portions 8, 8, vertical portions 9, 9,

ia horizontal base 10. The axle 3'- may be of any desired cross sectional shape, but I have illustrated a round axle upon which .is mounted near each end a block 12' with [being preferably provided for the'endof the spring and to place this coiled spring under tension a plate 16 is employed and the plate drawn down to the horizontal portions of the strap by the bolts 17. A boss instead of a'depr'ession can be used' to mountthe spring. r I

The compression given the spring is about a fourth ofthe compression to which the Spring will be subjected under the full load of the heater. 7

In order to hold the coiled spring in place, a flanged plate 18 is first riveted to the under surface of the plate 16. r

The construction is now in condition for securing it to the heater. The angle bar is punched with holes to receive the nuts 19, so that the plate 16 can. be brought into contact with the angle bar and nuts 20 are employed to secure the parts rigidly in place. This brings the holes previously: drilled in the straps and angle bar into alignment and rivets 21 are preferably employed to secure the ends of the straps.

In this way a very effective spring construction for the carrying axle can be readily and easily applied with Very little labor and expense. I

Having thusdescribed my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a device of the character specified, the combination with the heater body and carrying axle with axle block, of an outside and inside strap engaging under said block, the inside strap having vertical portions to guide said block,a plate enclosing the inside strap, with a spring interposed between said axle block and said plate and said straps secured together andto the heater of an ol tside and inside strep engaging under said block/the inside strep having vertical portions to guide said blbck, 51 plate enclosing the inside strap, with a spring interposed b teeneid. a le l sh wt aid: plate and said straps secured together and to the angle bars of the heater:

3. In a device of the character specified, the combine-tier; with; the @113 end 9 21 a le it M1 b1kf an Outside eed s de ew e ag n kml l sa d? block, the inside strap haviii'g Vertical portions to guide said block, a plate enclcsing the in side strap, end meafis for temp'oi m i-l-yvsecu-ringthe plate t0 the insi tle sti a p with a spring interposed between saidai-I'ep block and said plate and said straps secured toe he audito he heater hasty! HERMAN STR'fETMA-NN. fi esse; REDERICK H; W. F REY, 

